Back to results
US 5,605,720 AGranted
Method of continuously formulating and applying a hot melt adhesive
AssigneeJ&M Laboratories, Inc.
InventorsMartin A. Allen, John T. Fetcko
Life of this patent
Estimating the term…
Abstract
An in-line continuous method of formulating and applying a hot melt adhesive to a substrate involves metering a particulate polymer adhesive and a tackifier in a weight ratio in an extruder where the raw materials are formed into a homogeneous melt. The melt is continuously discharged directly into a hot melt applicator for deposition onto a substrate.
Claims14
An in-line continuous method of formulating and applying a hot melt adhesive to a substrate which comprises the steps of:
- (a) continuously metering into an extruder raw materials comprising particles of a polymer adhesive and a tackifier resin in the proper weight ratio;
- (b) heating and mixing the raw materials in the extruder to form a homogeneous melt of the raw materials;
- (c) continuously discharging the melt from the extruder directly into an applicator system comprising a plurality of air assisted applicators, each applicator having a pump and an applicator head;
- and
- (d) discharging the melt from the applicator heads onto a substrate.
2 more elements
A method of continuously formulating and applying a hot melt adhesive to a diaper layer, which comprises:
- (a) continuously metering into an extruder raw materials comprising particles of a polymer adhesive and a tackifier resin in a weight ratio of 10:90 to 50:50;
- (b) continuously heating and mixing the raw materials in the extruder to form a homogeneous melt of the raw materials;
- (c) continuously discharging the melt from the extruder into an applicator system comprising a plurality of air-assisted and intermittently operated applicator heads;
- (d) discharging the hot melt adhesive from the applicator heads onto a diaper layer in a pattern.
1 more element
Dependencies are inferred from the claim text.